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    • 95. 发明专利
    • Heat exchanger
    • 热交换器
    • JPS5758096A
    • 1982-04-07
    • JP13149680
    • 1980-09-24
    • Hitachi Ltd
    • OOE TOMIONAKAGAWA YUKIO
    • F28F9/22
    • PURPOSE: To prevent a fluid from stagnating near the ceiling of a hollow chamber by a method wherein a fluid passage forming member is arranged within the hollow chamber which is formed of an outer trunk and an outer shroud.
      CONSTITUTION: The cylindrical fluid passage forming member 19 fixed to a rectifying plate 16 is arranged longitudinally (vertically) within the hollow chamber 18 defined by the outer trunk 1, the outer shroud 10 and the outer periphery of an upper pipe plate 4 so that the hollow chamber 18 is divided into an inner fluid passage 20a and an outer fluid passage 20b with the top end of the member 19 lying adjacent to the outer periphery of the upper pipe plate 4. With the above structure, a fluid entering the outer fluid passage 20b in the chamber 18 from a fluid nozzle 20 rises up along the fluid passage forming member 19 and then flows down from the top end of the hollow chamber 18 to reach an inlet window 12. Therefore, it is possible to prevent the fluid from stagnating within the chamber 18 at a position higher in level than the inlet window 12 so that no great thermal stress is generated at the connection of the upper pipe plate 4 and the outer shroud 10.
      COPYRIGHT: (C)1982,JPO&Japio
    • 目的:通过其中流体通道形成构件布置在由外躯干和外护罩形成的中空腔内的方法防止流体在中空腔的顶部附近停滞。 构成:固定在整流板16上的圆柱形流体通道形成构件19沿纵向(纵向)布置在由外管1,外护罩10和上管板4的外周限定的中空室18内, 中空室18被分成内部流体通道20a和外部流体通道20b,其中构件19的顶端邻近上部管板4的外周。通过上述结构,进入外部流体通道 20b在流体喷嘴20的室18中沿着流体通道形成构件19上升,然后从中空室18的顶端向下流动到达入口窗口12.因此,可以防止流体停滞 在腔18内位于比入口窗12高的位置处,使得在上管板4和外护罩10的连接处不产生大的热应力。
    • 97. 发明专利
    • TESTING DEVICE FOR COMPOSITE EQUIVALENCE OF BREAKER
    • JPS56126772A
    • 1981-10-05
    • JP3035980
    • 1980-03-12
    • HITACHI LTD
    • TAKAHASHI ISAOKUBOTA YOSHIMASAKURASAWA TAKANAOOOHASHI TSUNEYOSHINAKAGAWA YUKIO
    • G01R31/327G01R31/333G01R31/32
    • PURPOSE:To make accord with a demanded value the recovery voltage after generation of four-parameter restriking voltage easily and rapidly by forming a power source of multistaged serial capacitors, resistors in parallel to the former, a discharge gap, etc. and thereby lowering the supply voltage impressed on the circuit breaker to be tested down to a prescribed value. CONSTITUTION:The power source which forms two sets of power sources together with a power source consisting of a capacitor 5, etc. and impressing required voltage V1 on the circuit breaker 1 to be tested and supplied voltage V2 to the breaker 1 is constituted by the series capacitors 6a, 6b the resistor 18 connected in parallel to the former and the controlling gap 19, etc. Accordingly, when the gap 19 is placed in a discharging condition at a required period of timing at the time of execution of the equivalence test and the capacitor 6b is discharged at a prescribed time constant through the intermediary of the resistor 18, a value of the wave- height of voltage is generated as a waveform of the four-parameter restriking voltage at the prescribed point of time, and thereafter, the voltage can be lowered rapidly and surely down to the recovery voltage demanded by an actual system.
    • 98. 发明专利
    • HEAT EXCHANGER
    • JPS55128782A
    • 1980-10-04
    • JP3555379
    • 1979-03-28
    • HITACHI LTD
    • OOE TOMIOSUMIKAWA MASAHARUNAKAGAWA YUKIOUENO TOSHIO
    • F28D7/16F28F9/02
    • PURPOSE:To provide a multitubular type heat exchanger wherein stress is reduced and reliability is enhanced by distributing numerous holes for tube plate on the inside, outside and periphery in the direction of radius and at an unequal distance. CONSTITUTION:On the inside, outside and periphery of the tube plates 5 and 9, through-holes 17 and 18 are distributed in the radius direction of the tube plates 5 and 9 with unequal distances. As an actual case of implementation, for example, it is possible to increase heat capacity of the periphery of the riggerment section 5a by expanding the distance of through-holes 17 and 18 gradually from the inner shroud 13 to the outer shroud 12, so that the thermal stress on the boundary between the riggerment 5a and rim section 5b is lessened due to delay in temperature response of the periphery of the tube plate against the sharp decrease in temperature of the second fluid. In addition, the temperature contraction volume of the rim section 5b is made to decrease to reduce stress arising on the mating part with the inner and outer shrouds 13 and 12. Thus, reliability of the equipment is enhanced by decreased occurrence of stress.